|
Abstract |
Acousto-Electronic Nonlinearity: New
Experimental Opportunities Using Ritec SNAP System
W.Arthur, B.O'Neill, R.Maev (Department
of Physics, University of Windsor, Windsor, Canada); I.Solodov (Department of
Acoustics, Faculty of Physics, Moscow State University, Moscow, Russia)
e-mail:
arthur1@uwindsor.ca
The
paper reports on experimental study of the
higher harmonic generation due to nonlinear acousto-electronic interaction in a
piezoelectric semiconductor. Ritec SNAP
1-30-I1 system is applied to
measurements of the interaction
characteristics in the frequency range up to 30 MHz in a CdS single crystal. The unique
capabilities of the SNAP system enables
extensive and detailed measurements of
higher harmonic amplitudes as functions
of distance and crystal conductivity for a wide range of input voltages. The
contributions of attenuation, dispersion
and nonlinearity into the
acousto-electronic interaction are identified
and analyzed based on the measured space and dynamic characteristics of the higher
harmonic generation. The experimental results obtained are compared with theoretical calculations
relevant to a small signal approximation.
Section
: 2